Rocker arm kit

Does any of you guys have any experince of these rocker arms /kit?
http://www.ebay.com/itm/MOPAR-383-4...ler-Rockers-PLYMOUTH-/220588964351#vi-content

None, but they are about 40 bucks cheaper from the company.
http://www.kmjent.com/cart/mopar-383-400-440-aluminum-1.5-roller-rockers-dodge.html
Any time you see something on Ebay you should look it up under the maker, because some Ebay sellers are just trying to make money off other companies products.